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CVE-2017-7928

30
FAUCET Score

CVE-2017-7928 is a critical improper access control vulnerability affecting Schweitzer Engineering Laboratories (SEL) SEL-3620 and SEL-3622 Security Gateways running specific firmware versions (R202, R203, R203-V1, R203-V2, R204, R204-V1). This flaw allows unauthorized communications to downstream devices when NAT port forwarding is configured. With a CVSS v3 score of 10.0, this vulnerability is highly severe, requiring no authentication or user interaction, and can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
r202CPE matchmatch criteria
cpe:2.3:o:selinc:sel-3620_firmware:r202:*:*:*:*:*:*:*
r203CPE matchmatch criteria
cpe:2.3:o:selinc:sel-3620_firmware:r203:*:*:*:*:*:*:*
r203-vCPE matchmatch criteria
cpe:2.3:o:selinc:sel-3620_firmware:r203-v:*:*:*:*:*:*:*
r203-v1CPE matchmatch criteria
cpe:2.3:o:selinc:sel-3620_firmware:r203-v1:*:*:*:*:*:*:*
r204CPE matchmatch criteria
cpe:2.3:o:selinc:sel-3620_firmware:r204:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.27%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0227 is in the 71st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ics-cert.us-cert.gov / advisories/ICSA-17-192-06
MitigationThird Party AdvisoryUS Government Resource
securityfocus.com / bid/99536
Third Party AdvisoryVDB Entry